National Instruments PXIe-5603 RF Signal Downconverter Module

The PXIe-5603 is an RF Signal Downconverter. The manufacturer of the NI PXIe-5603 is National Instruments. The PXIe-5603 Downconverter comes in two versions: one without pre-amp and another with pre-amp. The function of the NI PXIe-5603 is to convert the RF frequency to a lower level so the digitization process can be performed.  

This RF Signal Downconverter is not a stand-alone module. It is a part of the PXIe-5665 Vector Signal Analyzer or VSA. The NI PXIe-5665 is made up of three modules: the PXIe-5603 RF Signal Downconverter, the PXIe-5653 Analog Signal Generator, and the PXIe-5622 IF Digitizer. The PXIe-5653 Oscilloscope generates analog signals. The frequency of these signals is lowered by the PXIe-5603. These low frequency signals are then digitized by the PXIe-5622. The maximum center frequency of the PXIe-5665 VSA using a PXIe-5603 is up to 3.6 GHz.  

The NI PXIe-5603 features an SMA female connector. This RF Signal Downconverter supports both AC and DC coupling. The PXIe-5603 Downconverter can safely be operated under DC input voltages up to ±25 VDC. If current signals with high transients pass through the input connector of the NI PXIe-5603, it can harm the Downconverter permanently. The maximum level of the IF output of the PXIe-5603 Downconverter is +22 dBm. It is important that the resolution and temperature stability of the NI PXIe-5603 are not less than the NI PXIe-5622.  

PXIe-5603 Obsolete Status has been announced by National Instruments, but the RF Signal Downconverter will still be available for purchase and repairs by Apex Waves.